longley rice model
DESCRIPTION
Longley Rice Model PropagationTRANSCRIPT
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Modelo de Longley-Rice
Cristiano Torres do [email protected]
Pós-Graduação em Engenharia Elétrica
Belo HorizonteMaio de 2011
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INTRODUÇÃO
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Anos 50
A Era do Rádio...
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Breve Histórico
Longley,1978
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Desafios para Predição
Longley,1978
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Longley, 1978
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DISTRIBUIÇÃO RICE
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Rice, 1945
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Distribuição de Rice
Rice, 1945
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Uso do Modelo Rice
Longley, 1978
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MODELO LONGLEY-RICE
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Longley, 1978
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Longley, 1978
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Sinal Recebido
Longley, 1978
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Variabilidade de Situação
Longley, 1978
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Irregularidade do Terreno
Longley, 1978
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Longley, 1978
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Longley, 1978
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Variabilidade do Tempo
Hufford, 1985
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Parâmetros Atmosféricos
Longley, 1978
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Atenuação de Referência
Coeficientes de Difração
Hufford, 1985
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Função Difração
Hufford, 1985
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Função Difração
Hufford, 1985
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Hufford, 1985
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Longley, 1978
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Longley, 1978
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Atenuação de Referência
Longley, 1978
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Longley, 1978
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Longley, 1978
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Coeficientes Multiplicadores
Hufford, 1985
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Fator Urbano
Parson, 2000 & FCC, 2010
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EXEMPLOS PRÁTICOS
DE PREDIÇÃO
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Exemplo 1:Rádios Móveis (Longley, 1982)
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Algoritmo Longley-Rice
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Algoritmo Longley-Rice
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Exemplo 2:Parson (2000)
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Parâmetros
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Estatística de Estimação do Terreno
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Atenuação “Gume de Faca”
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Perda por Difração (Explícita)
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Exemplo 3:Radio Mobile
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http://www.cplus.org/rmw/english1.html
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Modo Ponto-a-Ponto
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Modo Área
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Definição dos Parâmetros Gerais
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Definição dos Locais das BTS
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Análise da Interferência
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Exemplo 4:Fontán, 2008
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